Events at Physics

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Events During the Week of June 11th through June 18th, 2017

Monday, June 12th, 2017

Atomic Physics Seminar
Optical magnetometry for the Munich neutron EDM experiment
Time: 11:00 am
Place: 5280 Chamberlin Hall
Speaker: David Wurm , TUM Munich
Abstract: The next generation experiments for the electric dipole moment (EDM) of the neutron search for a manifestation of yet unknown time reversal violation sources. In the Munich nEDM experiment ultra-cold neutrons are stored in two cylindrical vessels and subject to parallel and anti-parallel magnetic and electric fields. Applying Ramsey's method of separated oscillatory fields a phase proportional to the EDM is obtained from a clock comparison scheme.

The first part of this talk discusses the general scheme of nEDM experiment with respect to the upcoming 2018 measurements at the Institut Laue-Langevin. The latter part will focus on optical Cs and Hg magnetometers used to monitor and stabilize the magnetic field.
Host: Walker
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Tuesday, June 13th, 2017

No events scheduled

Wednesday, June 14th, 2017

No events scheduled

Thursday, June 15th, 2017

No events scheduled

Friday, June 16th, 2017

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Time: 2:00 pm
Place: WIPAC (222 W Washington, 5th floor, Supernova Conference Room)
Speaker: Nahee Park, University of Chicago
Abstract: Cosmic rays, high energy particles originating from outside of the solar system, are believed to be dominated by particles from our Galaxy at least up to the energy of 1015 eV. Recent results from direct measurements of cosmic rays, including the rise of the positron flux, the hardening of the light nuclei, and the different spectral indexes of the proton and helium spectra, challenge the classical models of the Galactic cosmic rays. Meanwhile, the development of gamma-ray experiments has opened a new window to study the acceleration and propagation of high-energy particles in the vicinity of the source sites, such as supernova remnants.

I will introduce HELIX (High Energy Light Isotope eXperiment), a near-future balloon-borne experiment designed to improve our understanding of the propagation of Galactic cosmic rays by measuring the key clock isotope 10Be up to 10 GeV/n. I will also present the Galactic gamma-ray measurements from the VERITAS experiment, an imaging atmospheric Cherenkov telescope measuring gamma rays with energies higher than 85 GeV and up to ~ 30 TeV. Focusing on the supernova remnants, I will discuss what we have learned about the acceleration of high-energy particles and what we expect to learn in the near future. Finally, I will highlight how neutrino observations with IceCube, in coordination with gamma-ray and cosmic-ray direct measurements, will broaden our perspective on the production and propagation of high-energy particles and advance us toward a new paradigm of Galactic cosmic rays.
Host: Westerhoff
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